Evaluate the integral.
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Provide an appropriate response.What effect does a 90° rotation of the coordinate axes have on the equation of the parabola -ax2 + y = 0? Give the new equation.
A. -av2 + u = 0 B. av2 + u = 0 C. au2 + v = 0 D. -au2 + v = 0
Solve the problem.R and R' are similar rectangles. Suppose that the width of R is a and the width of R' is 4a. If the area of R is 50 sq. in., what is the area of R' ?
A. 800 sq. in. B. 200a sq. in. C. 400 sq. in. D. 200 sq. in. E. none of these
Choose the graph that matches the equation.81x2 = 4y
A. 
B. 
C. 
D. 
Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 180 seconds are required to make a 5-by-4 enlargement, find the time required for a 
enlargement.
A. 336 sec B. 420 sec C. 378 sec D. 462 sec